drawing something with QPainter on a widget with Qt::WA_TranslucentBackground doesn't reset previous state.
The minimal example attached works on Linux/XCB and Mac well, but it doesn't work on weston. See the image attached.
|For Gerrit Dashboard: QTBUG-55956|
|171316,1||erase WA_TranslucentBackground QWidget background before drawing||5.8||qt/qtbase||Status: ABANDONED||-1||0|
|197758,2||Translucent background support||5.9||qt/qtwayland||Status: MERGED||+2||0|